WO2022100377A1 - 薄膜电容器芯子 - Google Patents

薄膜电容器芯子 Download PDF

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Publication number
WO2022100377A1
WO2022100377A1 PCT/CN2021/124640 CN2021124640W WO2022100377A1 WO 2022100377 A1 WO2022100377 A1 WO 2022100377A1 CN 2021124640 W CN2021124640 W CN 2021124640W WO 2022100377 A1 WO2022100377 A1 WO 2022100377A1
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WO
WIPO (PCT)
Prior art keywords
waterproof layer
film
base film
film capacitor
layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2021/124640
Other languages
English (en)
French (fr)
Chinese (zh)
Inventor
林晋涛
兰韶涵
张文刚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xiamen Faratroinic Co Ltd
Original Assignee
Xiamen Faratroinic Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xiamen Faratroinic Co Ltd filed Critical Xiamen Faratroinic Co Ltd
Priority to US18/036,426 priority Critical patent/US20240021374A1/en
Priority to JP2023528618A priority patent/JP7578820B2/ja
Priority to EP21890904.2A priority patent/EP4246544A4/en
Publication of WO2022100377A1 publication Critical patent/WO2022100377A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G4/00—Fixed capacitors; Processes of their manufacture
    • H01G4/002—Details
    • H01G4/224—Housing; Encapsulation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G4/00—Fixed capacitors; Processes of their manufacture
    • H01G4/002—Details
    • H01G4/228—Terminals
    • H01G4/248—Terminals the terminals embracing or surrounding the capacitive element, e.g. caps
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G4/00—Fixed capacitors; Processes of their manufacture
    • H01G4/32—Wound capacitors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G4/00—Fixed capacitors; Processes of their manufacture
    • H01G4/33—Thin- or thick-film capacitors (thin- or thick-film circuits; capacitors without a potential-jump or surface barrier specially adapted for integrated circuits, details thereof, multistep manufacturing processes therefor)
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K1/00—Printed circuits
    • H05K1/18—Printed circuits structurally associated with non-printed electric components
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
    • H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
    • H05K2201/10007—Types of components
    • H05K2201/10015—Non-printed capacitor

Definitions

  • the invention relates to the technical field of capacitors, in particular to a film capacitor core, a film capacitor loaded with the core and a printed circuit board loaded with the film capacitor.
  • Capacitors are one of the most widely used electronic components in electronic equipment, and are widely used in DC blocking, coupling, bypassing, filtering, tuning circuits, energy conversion and control circuits, etc. Film capacitors are widely used in circuit cross-line anti-electromagnetic interference , in the PCB board circuit of AC and DC filtering; most electrical appliances and electrical equipment operate in the indoor environment, with good temperature and humidity conditions; but with the development of new energy technology, such as photovoltaic inverters, charging piles and other outdoor Installation equipment; its environmental conditions are relatively harsh, and the continuous operation time is long; higher humidity and heat reliability requirements are put forward for the electronic components on the PCB board.
  • the core of the film capacitor is additionally coated with aluminum foil by means of artificial processing.
  • This method makes the production of the core of the film capacitor consume a lot of human resources, and the production of the core of the film capacitor requires a lot of human resources. The efficiency is low; or, the core of the film capacitor is not covered, the thickness of the film capacitor packaging material is increased, and the packaging material with better moisture resistance is used.
  • this method can also improve the moisture resistance of the film capacitor, it makes the final film Capacitors are oversized and cost-increasing, making them uncompetitive.
  • an object of the present invention is to provide a film capacitor core, using the coating film of the present invention to replace the original protective film of the film capacitor core, so that the waterproof coating process of the film capacitor core can be produced by producing the core.
  • the mechanical winding of the main body is completed, and further, on the premise of ensuring the production efficiency of the film capacitor core, the moisture resistance of the film capacitor core is improved.
  • the first aspect of the present invention provides a film capacitor core, which includes a core body, a coating film and a gold spray layer, and a coating film is wound on the peripheral outer surface of the core body,
  • the coating film includes a base film and a waterproof layer, the base film is attached with a waterproof layer, and the gold spray layers are arranged on both ends of the core body to form electrodes.
  • the film capacitor core according to the embodiment of the present invention includes a core body, a coating film and a gold spray layer, a coating film is wound on the peripheral outer surface of the core body, and the coating film includes a base film and a waterproof layer , and a waterproof layer is attached to the base film, and the sprayed gold layer is arranged at both ends of the core body to form electrodes, so that the waterproof coating process of the film capacitor core can be completed by the winding machine that produces the core body, and then , On the premise of ensuring the production efficiency of the film capacitor core, the moisture resistance of the film capacitor core is improved.
  • film capacitor core proposed according to the above embodiments of the present invention may also have the following additional technical features:
  • the gold spray layer covers at least one outer periphery of the waterproof layer.
  • the waterproof layer is a metal waterproof layer.
  • the waterproof layer is a metal oxide waterproof layer.
  • the waterproof layer is attached to the outer surface of one side of the base film, the width of the base film is consistent with the width of the core body, and a part of the waterproof layer is left blank to pass through the part.
  • the blank areas form electrical clearances.
  • part of the blank area of the waterproof layer is a single blank area, and the single blank area runs through the waterproof layer along the length direction of the waterproof layer.
  • part of the blank area of the waterproof layer is a plurality of blank areas, and the multiple blank areas are evenly distributed along the length direction of the waterproof layer.
  • the waterproof layer includes a first waterproof layer and a second waterproof layer, the first waterproof layer and the second waterproof layer are respectively attached to the outer surfaces of both sides of the base film, and the base film is The width is the same as the width of the core body, and both the first waterproof layer and the second waterproof layer are partially left blank, so as to form an electrical gap through the blank.
  • the base film includes a first base film and a second base film
  • the waterproof layer includes a first waterproof layer and a second waterproof layer
  • the first waterproof layer is attached to one side of the first base film
  • the second waterproof layer is attached to the outer surface of one side of the second base film
  • the first waterproof layer and the second waterproof layer are partially left blank
  • the first waterproof layer is dislocated from the blank area of the second waterproof layer.
  • the blank area of the first waterproof layer is located at the first end of the first base film
  • the blank area of the second waterproof layer is located at the second end of the second base film
  • the The first end is located opposite the second end.
  • a gap is provided at both ends of the waterproof layer close to the gold spray layer, and the width of the gap is smaller than the tolerance distance of the gold spray layer.
  • the base film includes a first base film and a second base film
  • the waterproof layer includes a first waterproof layer and a second waterproof layer
  • the first waterproof layer is attached to one side of the first base film
  • the second waterproof layer is attached to the outer surface of one side of the second base film
  • the first base film and the first waterproof layer have the same width
  • the second base film and the first waterproof layer have the same width.
  • the two waterproof layers are of equal width
  • a gap is set between the first base film and the first end of the first waterproof layer and the gold spray layer
  • the second base film and the first end of the second waterproof layer are provided with a gap.
  • There is a gap between the two ends and the gold spray layer, and the first end of the first base film and the first waterproof layer is opposite to the second end of the second base film and the second waterproof layer .
  • an embodiment of the second aspect of the present invention provides a film capacitor, which includes the above-mentioned film capacitor core.
  • the film capacitor of the embodiment of the present invention by loading the above-mentioned film capacitor core, the production efficiency of the film capacitor can be ensured, and at the same time, the moisture resistance of the film capacitor can be improved, so that it is suitable for high temperature and humid environment.
  • the embodiment of the third aspect of the present invention provides a printed circuit board, and the above-mentioned film capacitor is mounted on the printed circuit board.
  • the printed circuit board of the embodiment of the present invention by loading the above-mentioned film capacitor, the production efficiency of the printed circuit board is ensured, and at the same time, the moisture resistance of the printed circuit board is improved, and the printed circuit board is suitable for high temperature and humid environment.
  • FIG. 1 is a schematic structural diagram of a film capacitor core according to an embodiment of the present invention.
  • FIG. 2 is a schematic cross-sectional structural diagram of a film capacitor core according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a coating film provided on one side of a waterproof layer according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of a unilateral arrangement of a waterproof layer according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a unilateral arrangement of a waterproof layer according to another embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a unilateral arrangement of a waterproof layer according to another embodiment of the present invention.
  • FIG. 7 is a schematic diagram of a double-sided arrangement of a waterproof layer according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a coating film according to an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a coating film according to another embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of a coating film according to another embodiment of the present invention.
  • the core of the film capacitor is often covered with aluminum foil by means of artificial processing.
  • This method makes the production of the core of the film capacitor consume a lot of human resources, and the production efficiency of the core of the film capacitor is low. , and if the coating of the core is abandoned, the final film capacitor will have poor moisture resistance, and it is difficult to be suitable for use in a high temperature and humid environment;
  • the film capacitor core according to the embodiment of the present invention includes a core body, a coating film and gold spray layer, a coating film is wound on the peripheral outer surface of the core body, the coating film includes a base film and a waterproof layer, and a waterproof layer is attached to the base film, and the gold spray layer is arranged on the core body
  • the two ends are formed to form electrodes; so that the waterproof coating process of the film capacitor core can be completed by the winding machine that produces the core body, and then, under the premise of ensuring the production efficiency of the film capacitor core, the film capacitor core can be improved. moisture resistance.
  • FIG. 1 is a schematic structural diagram of a film capacitor core according to an embodiment of the present invention.
  • the film capacitor includes a core body 10 , a coating film 20 and a gold spray layer 30 .
  • the outer peripheral surface of the core body 10 is wound with a coating film 20, the coating film 20 includes a base film 21 and a waterproof layer 22, and the waterproof layer 22 is attached to the base film 21; the gold spray layer 30 is disposed on the core Both ends of the body 10 to form electrodes. Therefore, the coating film 20 can be directly wound on the core body 10 in a winding manner through the winding machine for producing the film capacitor core body, and further, the winding operation does not require any additional expenditure, and at the same time, It ensures the moisture resistance of the film capacitor core, making it suitable for high temperature and humid working environment.
  • the gold spray layer 30 covers at least one outer periphery of the waterproof layer 22 , so that the close contact between the gold spray layer 30 and the waterproof layer 22 can prevent the water vapor from the edge of the gold spray layer 30 from penetrating into the core body 10 , to further improve the moisture resistance of the film capacitor core.
  • the waterproof layer 22 may be a metal waterproof layer or a metal oxide waterproof layer; and when the waterproof layer 22 is a metal waterproof layer, an electrical gap needs to be formed to prevent short circuit.
  • the waterproof layer 22 is a metal waterproof layer
  • the waterproof layer 22 is attached to one outer surface of the base film 21 , and the width of the base film 21 is consistent with the width of the core body 10 to ensure the waterproof effect of the covering film 20 , A partial area of the waterproof layer 22 is left blank to form an electrical gap through the partially blank area.
  • part of the blank area of the waterproof layer 22 is a single blank area, and the single blank area runs through the waterproof layer 22 along the length direction of the waterproof layer 22 ; it should be noted that, as shown in FIG. 4, the opening position of the single blank area can be various, for example, the single blank area is opened in the middle of the waterproof layer 22; or the single blank area is opened at the end of the waterproof layer 22.
  • the waterproof layer 22 can be arranged on the side close to the core body 10 , or can be arranged on the side away from the core body 10 .
  • the film capacitor core claimed in the present invention is not limited to this; and, the single blank area is preferably a rectangular space, not only a rectangular space, any space that does not affect the formation of electrical gaps All shapes are acceptable.
  • some blank areas of the waterproof layer 22 are multiple blank areas, and the multiple blank areas are evenly distributed along the length direction of the waterproof layer 22 .
  • the waterproof layer 22 includes a first waterproof layer 221 and a second waterproof layer 222 , and the first waterproof layer 221 and the second waterproof layer 222 are respectively attached to the outer surfaces of both sides of the base film 21 .
  • the width of the base film 21 is the same as the width of the core body 10 , and the first waterproof layer 221 and the second waterproof layer 222 are partially left blank to form an electrical gap.
  • the waterproof layer 22 is attached to the outer surface of one side of the base film 21, there are many ways to attach the waterproof layer 22 to the base film 21 on one side; There are also various combinations on the membrane 21 .
  • the blank areas on both sides are located in the middle of the base film 21; alternatively, one of the blank areas may be located in the middle of the first waterproof layer 221, and the other side may be located at the center of the first waterproof layer 221.
  • the end of the second waterproof layer 222; or, one side of the blank area is located in the middle of the first waterproof layer 221, and the other layer is a plurality of rectangular blank areas evenly distributed. It can be understood that by attaching the waterproof layer 22 to the base film 21 on both sides, the moisture resistance of the film capacitor core after the wrapping film 20 is wound can be further improved.
  • the base film 21 includes a first base film 211 and a second base film 222
  • the waterproof layer 22 includes a first base film 211 and a second base film 222 .
  • a waterproof layer 221 and a second waterproof layer 222 the first waterproof layer 221 is attached to the outer surface of one side of the first base film 211
  • the second waterproof layer 221 is attached to the outer surface of one side of the second base film 222
  • Both the layer 221 and the second waterproof layer 222 are partially left blank, and the blank area of the first waterproof layer and the blank area of the second waterproof layer are dislocated.
  • the staggered arrangement of the blank areas of the second waterproof layer can make the first waterproof layer 221 and the second waterproof layer 222 form a complementary relationship, thereby making it difficult for ions to penetrate into the core body 10 and further improving the moisture resistance.
  • first base film 211 the second base film 222 , the first waterproof layer 221 and the second waterproof layer 222 .
  • the blank area of the first waterproof layer 221 is located at the first end of the first base film 211
  • the blank area of the second waterproof layer 222 is located at the second end of the second base film 212 .
  • the first end is opposite to the second end, and the blank area is staggered, so that the first waterproof layer 221 and the second waterproof layer 222 form a complementary relationship.
  • the blank area of the first waterproof layer 221 is located on the side of the first base film 211
  • the blank area of the second waterproof layer 222 is located on the second base film 212 relative to the first base film 212 .
  • the other side of one base film side is to stagger the two blank areas, so that the first waterproof layer 221 and the second waterproof layer 222 form a complementary relationship.
  • the blank area of the first waterproof layer 221 is located in the middle of the first base film 211 , and the blank areas of the second waterproof layer 222 are evenly distributed in the second base film 212
  • the blank area of the first waterproof layer 221 is staggered from the blank areas of the second waterproof layer 222 , so that the first waterproof layer 221 and the second waterproof layer 222 form a complementary relationship.
  • a gap is provided at both ends of the waterproof layer 20 close to the gold spray layer, and the width of the gap is smaller than the tolerance distance of the gold spray layer.
  • the gold spray layer has a certain tolerance. Therefore, the end of the waterproof layer 20 does not necessarily have to be flush with the end of the core body 10 .
  • the base film 21 includes a first base film 211 and a second base film 212
  • the waterproof layer 22 includes a first waterproof layer 221 and a second waterproof layer 222
  • the first waterproof layer 221 is attached On the outer surface of one side of the first base film 211
  • the second waterproof layer 222 is attached to the outer surface of one side of the second base film 212
  • the first base film 211 and the first waterproof layer 221 are of equal width
  • the second waterproof layer 222 has the same width, and a gap is provided between the first end of the first base film 211 and the first waterproof layer 221 and the gold spray layer to form an electrical gap through the gap.
  • the second base film 212 and the second waterproof layer A gap is provided between the second end of the layer 222 and the gold spray layer to form an electrical gap through the gap, and the first end of the first base film 211 and the first waterproof layer 221 and the second base film 212 and the second waterproof layer
  • the second ends of 222 are opposite to each other, so that the waterproof structures of the first base film 211 and the first waterproof layer 221 and the waterproof structures of the second base film 212 and the second waterproof layer 222 form a complementary relationship.
  • the film capacitor core includes a core body, a coating film and a gold spray layer, and a coating film is wound on the peripheral outer surface of the core body, and the coating film includes The base film and the waterproof layer, and the waterproof layer is attached to the base film, and the gold spray layer is arranged on both ends of the core body to form electrodes, so that the waterproof coating process of the film capacitor core can be produced by the winding machine of the core body.
  • the winding is completed, and further, on the premise of ensuring the production efficiency of the film capacitor core, the moisture resistance of the film capacitor core is improved.
  • the embodiments of the present invention provide a film capacitor, which includes the above-mentioned film capacitor core.
  • the film capacitor of the embodiment of the present invention by loading the above-mentioned film capacitor core, the production efficiency of the film capacitor can be ensured, and at the same time, the moisture resistance of the film capacitor can be improved, making it suitable for high temperature and humid environment.
  • the embodiment of the present invention provides a printed circuit board, and the above-mentioned film capacitor is mounted on the printed circuit board.
  • the printed circuit board of the embodiment of the present invention by loading the above-mentioned film capacitor, the production efficiency of the printed circuit board is ensured, and at the same time, the moisture resistance of the printed circuit board is improved, and the printed circuit board is suitable for high temperature and humid environment.
  • first and second are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as “first” or “second” may expressly or implicitly include one or more of that feature.
  • “plurality” means two or more, unless otherwise expressly and specifically defined.
  • the terms “installed”, “connected”, “connected”, “fixed” and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of the two elements or the interaction relationship between the two elements.
  • installed may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of the two elements or the interaction relationship between the two elements.
  • a first feature "on” or “under” a second feature may include the first and second features in direct contact, or may include the first and second features Not directly but through additional features between them.
  • the first feature being “above”, “over” and “above” the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature.
  • the first feature is “below”, “below” and “below” the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
PCT/CN2021/124640 2020-11-13 2021-10-19 薄膜电容器芯子 Ceased WO2022100377A1 (zh)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US18/036,426 US20240021374A1 (en) 2020-11-13 2021-10-19 Thin-Film Capacitor Core
JP2023528618A JP7578820B2 (ja) 2020-11-13 2021-10-19 フィルムコンデンサコア
EP21890904.2A EP4246544A4 (en) 2020-11-13 2021-10-19 Thin-film capacitor core

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202011267506.0A CN112397308B (zh) 2020-11-13 2020-11-13 薄膜电容器芯子
CN202011267506.0 2020-11-13

Publications (1)

Publication Number Publication Date
WO2022100377A1 true WO2022100377A1 (zh) 2022-05-19

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PCT/CN2021/124640 Ceased WO2022100377A1 (zh) 2020-11-13 2021-10-19 薄膜电容器芯子

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US (1) US20240021374A1 (https=)
EP (1) EP4246544A4 (https=)
JP (1) JP7578820B2 (https=)
CN (1) CN112397308B (https=)
WO (1) WO2022100377A1 (https=)

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CN112397308B (zh) * 2020-11-13 2025-12-09 厦门法拉电子股份有限公司 薄膜电容器芯子

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